/**
 * Copyright (c) 2016 eBay Software Foundation. All rights reserved.
 * <p>
 * Licensed under the MIT license.
 * <p>
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * <p>
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * <p>
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * <p>
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.ebayopensource.deployment;

import org.ebayopensource.winder.TaskData;

import java.util.ArrayList;
import java.util.List;

/**
 * Group strategy
 *
 * @author Sheldon Shao xshao@ebay.com on 11/27/16.
 * @version 1.0
 */
public class SimpleGroupStrategy implements GroupStrategy {
    @Override
    public List<InstanceState> getGroup(List<TaskData> statuses, int groupId, int maxGroup) {
        int total = statuses.size();
        int groupSize = total / maxGroup;
        int size = groupSize;
        if (groupSize == maxGroup) {
            size += total % maxGroup;
        }
        List<InstanceState> group = new ArrayList<>(size);
        int from = (groupId-1) * groupSize;
        int to = size + from;
        for(int i = from; i < to; i ++) {
            group.add(new InstanceState(statuses.get(i)));
        }
        return group;
    }
}
